Dumb-waiter



(No Model.) 2 sheets-sheet 1., M. J. LAWLOR.

DUMB WAITER.

Fg'd'latented Mar. 29, 1887.

No.A 360,027.

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lUNiTnD STATES ATENT Price.

MICHAEL J. LAVLOR, OF IOUGHKEEPSIE, NE\V YORK.

`DlJiVIB-WAITER.

SPECIFICATION forming part of Letters Patent No. 30,027, dated March 29,1887.

Application filed Angustdi, 1886. Serial No. 210,014. (No model.)

To all whom it may concern:

Beit known that I, MICHAEL J. LAwLoR, a citizen ofthe United States, residing at Poughkeepsie, in the county of Dutchess and State of New York, have invented a new and useful Improvementin Dumb-Wvaiters, Lifts, and like Elevatiug Mechanism, of which the following is a specification.

The object of my invention is to make a dumb-waiter with its parts so arranged as to reduce friction of working.parts, sharp bends in the rope holding lthe car and weight, and having guide-wheels so arranged that the balanceweight may be conducted to any desired position around the car; and it consists in the combination, construction, and arrangement of its parts, as hereinafter more fully described. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure l'is a front view of my improved dumb-waiter or lift as shown when the balanceweight is carried to the right-hand side of the car and in the plane of the weight F and wheel B. Fig. 2 is a plan View of Fig. 1. Fig. 3 is a front view of my invention, taken at line a" x, Fig. 4, showing the balance-Weight conveyed in a different direction from that shown in Fig. l. Fig. Ltis aplan view of Fig. 3.

Similar letters referto similar parts throughout the several views.

A shows the hoist-wheel attached to the shaft b, over which an endless rope passes in a V-shaped groove, by which power is transmitted to the load.

B is a pulley attached to the shaft b, over' which the rope holding the car and weight passes.

C is a guide-wheehwhieh guides the counterbalancing-rope from the car to the pulley B, and in some eases it may be omitted and a slot in the shelf substituted.

D and E are guide-wheels, which, when arranged in the plane of each other and so placed that wheel D is directly under the pulley B, and it takes the rope H from said wheel B in a line perpendicular to the shelf on which the wheels D and E rest, guide the rope H to any desired position at the angles a and f1, as

5o shown in Fig. 4.

F is the balance-weight, which should balance the ear or be one or two pounds heavier.

G is the car into which the articles to be raised or lowered are placed.

H is the rope which connects the car with the balanceweight.

I is an endless hoisting-rope, by which power is transmitted to the load.

J shows the feet or standards which support the frame L L.

K shows a part of the frame L L, and made s0 that it rigidly connects the parts L L so as to make a solid and stationary bearing for the shaft b to revolve in, thus reducing the friction which is the result in separate frames or standards.

I will describe my invention. On the rotary shaft b, which carries the hoist-wheel A, I place a pulley, B, securely fastened to said shaft and occupying any position on the same as may be necessary or convenience of construction may require. I arrange the wheels C, D, and E as shown, so that the counterbalance rope H may be carried up and over wheel C from the center of the car G, guided by the said wheel C to the pulley B, over which the said rope H passes down and over the guide-wheel D, then along and over the guide-wheel E to the balance-weight F. Vhen the weight is to be placed on the right-hand side of the car and in the plane of the pulley B, as in Figs. l and 2, I place the wheels D and E as far apart as may be convenient, so as to save the rope from wear by avoiding sharp bends and kinks. The guidewheels D and E are also so placed that the rope passing over them just passes the rope as it comes up from the car without touching. Then the weight is to be placed in any other position than in the plane of the wheel B, as in the positions shown in Figs. 3 and 4, I place the guide-wheel D so that the rope H will come down from the pulley B perpendicular to the shelf on which the frame is supported, and make a perpendicular line in the plane ofthe pulley B, and around this line as an axis I revolve the guide-wheel D in the direction required-that is, in any direction in the angles a and on that side of the line parallel to the shaft b through the axis a, and

when the weight is to be on the other side of loo this line I change the arrangement of the porting-wheel B, the 'guide-Wheel C, the 15 Wheels, as in Figs. 1 and 2, but moving the guide-wheel D, arranged at an angle to the guide-Wheel D inward, so as to be n the plane supporting-wheel B, and the guide-Wheel E, of the perpendicular from the pulley B, as in the same plane as the Wheel D, the counter- 5 hereinbefore described. The guidewheel C poise rope H being passed from the car over may in sonne cases be left out, and a long slot the supporting Wheel B, thence under the 2o cut in the shelf instead of said Wheel. guide-wheel D, and across at an angle to the Having thus described my invention, whatI axle of the hoisting-Wheel to the guide-wheel claim, and desire to secure by Letters Patent, E, all substantially as described.

ro is- A ,T

The combination of a dumb-Waiter car hav l MICHAEL J' LA LOB' I ing connected thereto a eonnterbalance-Weight by means of the :rope H, the hoisting wheel or F. W. PUGsLnY, drum, having on its axle the counterpoise sup- K. J. LAWLOR.

Vitnesses: ,-5 

